#define _CRT_SECURE_NO_WARNINGS 1
#include"string.h"

int main()
{
	zhaojiahao::string s1("123456789");

	cout << s1.c_str() << endl;

	s1.push_back('1');
	s1.push_back('2');
	//s1.push_back(3);
	s1.push_back(64);
	cout << s1.c_str() << endl;
	s1 += "12345679999";
	cout << s1.c_str() << endl;
	s1.insert(3,"wwww");
	cout << s1.c_str() << endl;


	return 0;
}